package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishFlavorService;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;


    @Autowired
    private DishFlavorMapper dishFlavorMapper;


    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private CategoryMapper categoryMapper;
    /**
     * 保存菜品和口味
     * @param dto
     */
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dto) {

        //添加菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dto,dish);
        dishMapper.insert(dish);
        Long id = dish.getId();
        //添加口味

        List<DishFlavor> flavors = dto.getFlavors();
        if(flavors != null && !flavors.isEmpty()) {
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(id);
            }
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 分页查询菜品
     * @param dishPageQueryDTO
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> dishVo = dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(dishVo.getTotal(),dishVo.getResult());
    }

    @Override
    public void deleteBatch(List<Long> ids) {
        //判断是否启售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == 1){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断是否关联了套餐
        List<Long> setmealId = setmealDishMapper.getSetmealIdByDishId(ids);
        if(!setmealId.isEmpty()){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品
        for (Long id : ids) {
            //删除口味
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {

        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dto) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dto,dish);
        dishMapper.update(dish);
        List<DishFlavor> flavors = dto.getFlavors();
        if(!flavors.isEmpty()){
            flavors.forEach(flavor -> {
                flavor.setDishId(dto.getId());
            });
            dishFlavorMapper.deleteByDishId(dto.getId());
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public void startOrStop(Long status , Long id) {
        Dish dish = new Dish();
        dish.setStatus(status.intValue());
        dish.setId(id);
        dishMapper.updateStatus(dish);
    }

    @Override
    public List<Dish> getList(Long categoryId) {

        return dishMapper.getByCategoryId(categoryId);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
}
